Heartless man, at tolls, swivels (7)
I believe the answer is:
gyrates
'swivels' is the definition.
'heartless man at tolls' is the wordplay.
'heartless' says to hollow out the word (remove centre letters).
'man' becomes 'guy' (guy is a kind of man).
'at' is a charade indicator (letters next to each other).
'tolls' becomes 'rates' ().
'guy' with its centre removed is 'gy'.
'gy'+'rates'='GYRATES'
(Other definitions for gyrates that I've seen before include "Goes round and round" , "Moves in a spiral course" , "turns" , "Spins, whirls" , "Circles" .)